.topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 24px;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand img {
  height: 79px;
  width: auto;
  display: block;
  transition: transform 0.25s ease, filter 0.25s ease;
}

.brand img:hover {
  transform: scale(1.03);
  filter: drop-shadow(0 0 6px rgba(37, 99, 235, 0.35));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-links a,
.dropdown-desktop > a,
.dropdown-title {
  color: #111827;
  text-decoration: none;
  font-size: 0.96rem;
  font-weight: 500;
}

.dropdown-desktop {
  position: relative;
  padding: 10px 0;
}

.dropdown-desktop > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dropdown-desktop::after {
  content: "";
  position: absolute;
  left: 0;
  top: 100%;
  width: 100%;
  height: 12px;
}

.dropdown-menu {
  background: #ffffff;
}

.dropdown-desktop .dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  display: none;
  padding: 10px 0;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.10);
  z-index: 1001;
}

.dropdown-desktop:hover .dropdown-menu {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 10px 16px;
  color: #111827;
  text-decoration: none;
  font-size: 0.95rem;
  white-space: nowrap;
}

.dropdown-menu a:hover {
  background: #f3f4f6;
}

.mobile-menu {
  display: none;
}

.mobile-menu-toggle {
  list-style: none;
  width: 46px;
  height: 46px;
  border: 1px solid #dbe3ee;
  border-radius: 12px;
  background: #ffffff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.mobile-menu-toggle::-webkit-details-marker {
  display: none;
}

.mobile-menu-toggle::marker {
  display: none;
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: #111827;
}

.dropdown-title {
  display: block;
  padding: 14px 8px 10px;
}

@media (min-width: 981px) {
  .nav-desktop {
    display: flex;
  }
}

@media (max-width: 980px) {
  .nav {
    min-height: 74px;
    gap: 12px;
  }

  .brand img {
    height: 60px;
  }

  .nav-desktop {
    display: none;
  }

  .mobile-menu {
    display: block;
    margin-left: auto;
    position: relative;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu[open] .mobile-menu-toggle {
    background: #f8fafc;
  }

  .mobile-menu .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: min(300px, calc(100vw - 32px));
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 0;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.12);
    z-index: 1002;
  }

  .mobile-menu .nav-links > a,
  .mobile-menu .dropdown-title {
    padding: 14px 16px;
    border-top: 1px solid #eef2f7;
  }

  .mobile-menu .nav-links > a:first-child {
    border-top: 0;
  }

  .mobile-menu .dropdown {
    display: block;
  }

  .mobile-menu .dropdown-menu {
    display: block;
    padding: 0 0 8px 16px;
    background: transparent;
  }

  .mobile-menu .dropdown-menu a {
    padding: 10px 16px;
    white-space: normal;
    color: #4b5563;
  }
}